Synthesis, crystal structure and third-order non-linear optical property of heterobimetallic cluster compound [MoOICu3S3(2,20-bipy)2]

Nest-shaped cluster [MoOICu3S3(2,20-bipy)2] (1) was synthesized by the treatment of (NH4)2MoS4, CuI, (n-Bu)4NI, and 2,20-bipyridine (2,20-bipy) through a solid-state reaction. It crystallizes in monoclinic space group P21=n; a ¼ 9:591ð2Þ A; b ¼ 14:820ð3Þ A; c ¼ 17:951ð4Þ A; b ¼ 91:98ð2Þ8; V ¼ 2549:9ð10Þ A3; and Z ¼ 4: The nest-shaped cluster was obtained for the first time with a neutral skeleton containing 2,20-bipy ligand. The non-linear optical (NLO) property of [MoOICu3S3(2,20-bipy)2] in DMF solution was measured by using a Z-scan technique with 15 ns and 532 nm laser pulses. The cluster has large third-order NLO absorption and the third-order NLO refraction, its a2 and n2 values were calculated as 6.2 £ 10210 and 23.8 £ 10217 m2 W21 in a 3.7 £ 1024 M DMF solution. q 2004 Elsevier B.V. All rights reserved.